Blower



Jan.4, 1938. w. H. LEINWEBER BLOWER .Lejhweber INVENTOR Filed July 30,1936 5 BY H15 ATTORNEY.

Patented Jan. 4; 1938 7 UNITED STATES j PATENT OFFICE BLOWER. William-H.rainwater, Chicago, 111.

Application July 30, 1936, Serial No. 93,377

"2 Claims. -(c1. 230-119) This invention relatesto blowers. It is anobject of'this invention to provide an improved blower which isrelatively simple and inexpensive in construction, and eiiicient in use.

Another object of the present invention is to provide a blowerparticularly adapted for use in conjunction with ventilating and airconditioning apparatus, so constructed that it will circulate air at agreater velocity with less resistv ance than blowers heretofore made.

A further object of the present invention is to provide a blower forutilizing the air forced into the housing from the two sides to draw Iadditionalair into the housing, thus increasing the efliciency of theblower.

Other objects will appear hereinafter.

The invention consists of the novel combination and arrangementsof partsto be hereinafter described and claimed.

The invention will best be-understood by reference to the accompanyingdrawing in which Fig. 1 is a side elevational view of a preferred formof the new blower;

Fig. 2 is a vertical sectional view of the same as seen on line 2-2,Fig. 1;

Fig. 3 is an end elevational view as seen line 3 in Fig. 1; and 1 Fig. 4is a fragmentary sectional view of a from modified form of the rimstructure and annular ring structure shown in Fig. 2 of the preferredform of the new blower.

A preferred form of the new blower is illustrated in the drawing andcomprises a body II) which includes a pair of impeller units in the formof a pair of hub structures II and I2 each of which have a plurality ofarms I5 in the form' of fan blades extending radially therefrom andmerging into rim portions I3 and I4 respectively. These rim portions I3and I4 are fixed by means of screws I6 to a pair'of correspondingannular rings I1 and I8 which are disposed in spaced relation withrespect to each other by a plurality of vanes I9 which are formed asanintegral part of the annular rings I1 and I8.

The vanes I9 extendparallel to the axis of the hubs II and I2 and haveaconcaved curvature on one side or face 20 thereof, these concaved sidesor faces 20 ofthe vanes. I9 facing toward the leading edges 2I of thevanes I9; that is, fac- -The arms or impellerblades l5 extend from gothe hub portion II, or I2, with the leading edge 25 disposedsubstantially away from the rim portion I301 I4 at the radial extremityof the blades I5 but having a supporting web 21 formed integrallytherebetween; the trailing edge 26 at the radial extremity of the bladesI {merging into the rim portion I3 or I4, as the case may be, thusleaving an open'space 28 between the blade and the rim I3 or I4 for areason to be given presently.

In use the new blower may be mounted upon a drive shaft 30 shown indotted lines (Fig. 2) which is supported by a pair of brackets 3| alsoshown in dotted lines. These brackets in turn are supported by a housing32, likewise shown in dotted lines, which is open at both sides as at 33and which has a duct portion 34 leading tangentially therefrom.

' It is to be noted that while the vanes I9 of the blower arecontained'within the housing 32, the

' impeller blades I5 may extend through .the side openings 33 formed inthe housing 32 and that the openings 28 formed at the radial extremityof each of the blades I5 are substantially outside thehousing 32.

In the-operation of the blower (clockwise as seen in Fig. 1) air isdrawn into the housing 32 by the impeller blades I5, the cups 23impelling air over the concave curvature or face 24 of the the face 24sets upa vacuum in the region of the openings 28 and draws airtherethrough from a direction at an angle to the axis of the hubs I Iand- I2 (as indicated by the arrows, Fig. 2),

thereby gaining a greater supply of air for the blower unit. The airthus drawn in from both sides of the housing 32 is swished within thelatter by the vanes I 9, the concave faces 20 of which force the aircentrifugally from the axis of the hub structure and out through theduct 34.

Referring to, Fig. 4, I3 and I4 illustrate a modification of the rimportions I3 and I4 of the dvicesh'own in Figs; 1, 2 and 3; similarly, n'and I8 illustrate a corresponding. modification .of the annular rings I1and I8 of the same.

noted the latter are funnel shaped and thereby blades I5. The velocityof the air'moving along increase the intakeof air into the blower unitat -a minimum of resistance and likewise increase .the efficiency of thenew-blower unit.

Other parts illustrated in Fig. 4' corresponding to the respective'parts of the illustration in Fig.

2, are given primed numerals which correspond showing.

While I have illustrated and described the pre-' with. the ordinarynumerals of the: Preferred variations and modifications as come withinthe scope of the appended claims.

Having thus described my invention, what I claim as new and desire toprotect by Letters Patent is:

1. A blower comprising a pair of air impellers each having a hub memberaligned co-axially with the other and each having, blade membersattached to their respective hub members and having formations extendedaxially in advance of said hub member, each said impeller having anannulus extended'around and attached to the radial extremities of saidblades, each of said blades having an opening adjacent its said radialextremity, and a plurality of vanes arranged .around the common axis ofsaid hubs between the respective annular parts of said impellers.

2. A blower including a pair of spaced oppositely disposed air impellerseach having hub portions and each having blades with a pocketlikeformation extendedaxially in advance of the hub portion thereof forengaging air in a region closely adjacent said hub, each said impellerhaving a ring-like member joining the radial ends of said blades, andeach of the latter having an opening in the radial extremity thereofadjacent said ring member, and a plurality of blades arranged in spacedrelation around said hub portions and secured to said ring-like membersof each of said impellers.

3. In a blower comprising a body including a pair of impeller units eachincluding a hub structure, a plurality of impeller blades radiallyarranged about and'integral with the hub structure, said impeller bladeshaving a leading edge and a trailing edge, said trailing edge merging atthe radial extremity of said impeller blade with a rim, and said leadingedge disposed sub- .stantially laterally from said rim to form anopening between the latter and the radial extremity of said blade, saidpair of impeller units being disposed in spaced relation with respect toeach other by a plurality of vanes extending between the rims of saidimpeller units and having their axis extending substantially parallelrelative to each other and the axis of said'hub strucures.

a. In a blower comprising a body including a.

.pair of impeller units each including a hub structure, a plurality ofimpeller blades radially arranged about and integral with the hubstructure, said impeller blades having a leading edge and a trailingedge, said trailing edge merging at the radial extremity of saidimpeller blade with a rim, and said leading edge disposed substantiallylaterally from said rim to form an opening between the latter and theradial extremity of said blade, said pair of impeller units beingdisposed in spaced relation with respect to each other by a plurality ofvanes extending between the rims of said impeller units and having theiraxis extending substantially parallel relative to each other and theaxis of said hub structure, whereby when said blower is in use air willbe directedby said impeller blades between said impeller units and willbe directed by the vanes tangentially from the radially outer ends ofthe latter.

5. In a blower comprising a body including a pair of impeller units eachincluding a hub.structure, a plurality of impeller blades radiallyarranged about and integral with the hub structure, said impeller bladeshaving a leading edge and a trailing edge, said trailing edge merging atthe radial extremity of said impeller blade with a rim, and said leadingedge disposed substantially laterally from said rim to form an openingbetween the latter and the radial extremity of said blade, said bodyincluding a pair of annular rings having a plurality of vanes arrangedtherebetween and integrally therewith, each of said annular rings havingone of said impeller units fixed thereto at the outer side thereof withrespec to the vanes, said vanes having their axis extendingsubstantially parallel relative to each other and the axis of said hubstructure, whereby when said blower is in use air will be directed bysaid impeller blades between said impeller units and will be directed bythe vanes tangentially from the radially outer ends of the latter.

6. In a blower comprising a body including a pair of impeller units eachincluding a hub structure, a plurality of impeller blades radiallyarranged about and integral with the hub structure, said impeller bladeshaving a leading edge and a trailing edge, said trailing edge merging atthe radial extremity of said impeller blade with a rim, and said leadingedge disposed substantially laterally from said rim to form an openingbetween the latter and the radial extremity of said blade, said bodyincluding a pair of annular rings having a plurality of vanes arrangedtherebetween and integrally therewith, each of said annular rings havingone of said impeller units fixed thereto at the outer side' thereof withrespect to the vanes, said vanes having their axis extendingsubstantially parallel relative to each other and the axis of said hubstructure, whereby when said blower is in use air will be directed bysaid impeller blades to a point between said impeller units and will bedirected by the vanes tangentially from the radially outer ends of thelatter thereby drawing additional air through the opening formed betweenthe radial extremity of the impeller blade and the rim to a pointbetween said impeller units.

'7. In a blower comprising a body including a pair of impeller unitseach including a hub' structure, a plurality of impeller blades radiallyarranged about and integral with the hub structure, said impeller bladeshaving a leading edge and a trailing edge, said trailing edge merging atthe radial extremity-of said impeller blade with a rim, and said leadingedge disposed substantially laterally from said rim to form an openingbetween the latter and the radial extremity of said blade, said bodyincluding a pair of annular rings having a plurality of vanes arrangedtherebetween and integrally therewith, each of said annular rings havingone of said impeller units fixed thereto at the outer side there-WILLIAM H. LEINWIBER.

of with respect to the vanes, said vanes having

